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Up on Dec. 23: Boehner's deficit 'Plan B,' Tim Scott, what gun control laws should look like

On Sunday's Up w/ Chris Hayes, we'll examine the implosion of the "fiscal curb" talks, with House Speaker John Boehner walking away from President Obama's lates

On Sunday's Up w/ Chris Hayes, we'll examine the implosion of the "fiscal curb" talks, with House Speaker John Boehner walking away from President Obama's latest offer and the possibility of Social Security cuts in a long-term deficit deal. We'll also discuss the future of gun control legislation with two mayors who have called for tough new laws to curb the spread of illegal guns. And we'll examine the rise of South Carolina's Tim Scott, who is set to become the first black senator from the South since Reconstruction.

Joining Chris on Sunday at 8 AM ET on msnbc will be:

Former Governor James Florio (D-NJ), Adjunct Professor of Public Policy and Administration at Rutgers University

Mayor Kasim Reed (D-Atlanta, GA)

Mayor Michael Nutter (D-Philadelpha, PA)

Dylan Glenn, Senior Vice President of Guggenheim Advisors and former Special Assistant to President George W. Bush

Heidi Moore, Finance and Economics Editor for The Guardian newspaper

Kevin Alexander Gray, Contributing Editor to Black News and Contributing Writer to CounterPunch and Black Agenda Report

Maya Wiley, Founder and President of the Center for Social Inclusion

Dean Baker, Co-Director of the Center for Economic and Policy Research

Rebecca Peters, international arms control advocate who led the campaign to reform Australia's gun laws after the 1996 Port Arthur massacre.